Which microcontroller should I use for my projectm

Hi,
I'm fairly new to microcontrollers and have read multiple guides, although still asking the question.
I have used Arduino for quite a long time and have developed some product concept. I am only 14 years old though.
I am currently developing a wearable project, therefore size, weight, and battery are huge constraints.
My project will include; Touch OLED, Gyro, IR LED and receiver.
As I have used Arduino, I am quite familiar with the Arduino offset of C++.
It will be appreciated if the MCU has example codes/ others have used similar components.
Could you please help me on both; hardware and software.

Thankyou in advance.